Noun

(en noun)

The act of examining.

* {{quote-magazine, date=2013-07-20, volume=408, issue=8845, magazine=(The Economist)

, title= Welcome to the plastisphere , passage=[The researchers] noticed many of their pieces of [plastic marine] debris sported surface pits around two microns across. Such pits are about the size of a bacterial cell. Closer examination showed that some of these pits did, indeed, contain bacteria, […].}}

Particularly, an inspection by a medical professional to establish the extent and nature of any sickness or injury.

A formal test involving answering written or oral questions with no or limited access to text books or the like.

Noun

(uncountable) Diligent inquiry or examination to seek or revise facts, principles, theories, applications, etc.; laborious or continued search after truth.

* {{quote-magazine, date=2012-01

, author=Philip E. Mirowski , title=Harms to Health from the Pursuit of Profits , volume=100, issue=1, page=87 , magazine= citation , passage=In an era when political leaders promise deliverance from decline through America’s purported preeminence in scientific research , the news that science is in deep trouble in the United States has been as unwelcome as a diagnosis of leukemia following the loss of health insurance.}}

(countable) A particular instance or piece of research.

* Macaulay

The dearest interests of parties have frequently been staked on the results of the researches of antiquaries.

* 1747 , The Scots magazine (volume 9, page 567)

The first step I took in this so necessary a research , was to examine the motives, the justice, the necessity and expediency of the revolution